Finding the Fourth Proportional to 28,128,438.61, 42,194,290.83 and 10,856,735.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,128,438.61 : 42,194,290.83 = 10,856,735.49 : x
2. Step 2: Convert to fraction form
   28,128,438.61/42,194,290.83 = 10,856,735.49/x
3. Step 3: Cross multiply
   28,128,438.61x = 42,194,290.83 × 10,856,735.49
4. Step 4: Simplify right side
   28,128,438.61x = 458,092,254,729,442.56
5. Step 5: Solve for x
   x = 458,092,254,729,442.56/28,128,438.61
6. Step 6: Final answer
   x = 16,285,733.49